u/Ok-Extension-832

Been working out for a while now but I never understood which tricep heads works during certain movements. What I’ve heard some people say is that the Long Head is biased when your elbow is fixed onto your body, and the Medial and Lateral Head work more when your upper arm move. But i’ve also heard the exact opposite from people, and ChatGPT told me the Long Head is biased when the elbow isn’t fixed.

Knowing this won’t really affect my training and doesn’t really have a purpose at this point. I’m just really curious and confused because I’ve heard opposite things said.

If you’re doing a lot of exercises at ~0–1 RIR (especially in a full body split), exercises near the end of the workout will be performed with more accumulated fatigue than those at the beginning. If you do 2 sets consecutively, the first exercises get both sets relatively fresh, while the later exercises may have both sets affected by fatigue.

So instead of:
Bench Press — 2 sets
Weighted Pull-Up — 2 sets
Squat — 2 sets
Would it make more sense to do:
Bench Press — 1 set
Weighted Pull-Up — 1 set
Squat — 1 set
Bench Press — 1 set
Weighted Pull-Up — 1 set
Squat — 1 set

This way, every exercise gets its first set relatively fresh, rather than some exercises getting both sets while fresh and others getting both after substantial fatigue.
Does this meaningfully improve the hypertrophic stimulus, or is exercise-order fatigue not significant enough for this to matter?